MRI-Safe and Force-Optimized Implantable Ring Magnet System with an Enhanced Inductive Link
AssigneeMED-EL Elektromedizinische Geraete GmbH
InventorsThomas Wilhelm Eigentler, Andreas Hofner, Ingeborg Hochmair
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Abstract
A magnetic system for a medical implant system is described. A planar implant receiver coil is configured to lie underneath and parallel to overlying skin of an implanted patient for transcutaneous communication of an implant communications signal. A planar ring-shaped attachment magnet also is configured to lie underneath and parallel to the overlying skin and radially surrounds the receiver coil. The attachment magnet is characterized by a magnetic field configured to avoid creating torque on the attachment magnet in the presence of an external magnetic field.
Claims12
A magnetic system for a hearing implant system for a patient user, the system comprising:
- an implant housing having:
- a ring-shaped implant receiver coil configured to lie underneath and parallel to overlying skin of an implanted patient for transcutaneous communication of an implant communications signal;
- and
- a ring-shaped attachment magnet configured to lie underneath and parallel to the overlying skin and radially surrounding the receiver coil,
- wherein the implant housing and the attachment magnet are configured to enable rotation of the attachment magnet within the implant housing in the presence of an external magnetic field, and
- wherein the implant housing further comprising a sensor adapted for determining the relative angle of rotation between the implant housing and the attachment magnet.
Dependencies are inferred from the claim text.